Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | fscpos.c - Kernel module for hardware monitoring with FSC Poseidon chips | |
3 | Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch> | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | /* | |
21 | fujitsu siemens poseidon chip, | |
22 | module based on the old fscpos module by Hermann Jung <hej@odn.de> and | |
23 | the fscher module by Reinhard Nissl <rnissl@gmx.de> | |
24 | ||
25 | original module based on lm80.c | |
26 | Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> | |
27 | and Philip Edelbrock <phil@netroedge.com> | |
28 | ||
29 | Thanks to Jean Delvare for reviewing my code and suggesting a lot of | |
30 | improvements. | |
31 | */ | |
32 | ||
33 | #include <linux/module.h> | |
34 | #include <linux/slab.h> | |
0cacdf29 | 35 | #include <linux/jiffies.h> |
1da177e4 | 36 | #include <linux/i2c.h> |
1da177e4 | 37 | #include <linux/init.h> |
943b0830 MH |
38 | #include <linux/hwmon.h> |
39 | #include <linux/err.h> | |
9a61bf63 | 40 | #include <linux/mutex.h> |
87808be4 | 41 | #include <linux/sysfs.h> |
1da177e4 LT |
42 | |
43 | /* | |
44 | * Addresses to scan | |
45 | */ | |
25e9c86d | 46 | static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END }; |
1da177e4 LT |
47 | |
48 | /* | |
49 | * Insmod parameters | |
50 | */ | |
f4b50261 | 51 | I2C_CLIENT_INSMOD_1(fscpos); |
1da177e4 LT |
52 | |
53 | /* | |
54 | * The FSCPOS registers | |
55 | */ | |
56 | ||
57 | /* chip identification */ | |
58 | #define FSCPOS_REG_IDENT_0 0x00 | |
59 | #define FSCPOS_REG_IDENT_1 0x01 | |
60 | #define FSCPOS_REG_IDENT_2 0x02 | |
61 | #define FSCPOS_REG_REVISION 0x03 | |
62 | ||
63 | /* global control and status */ | |
64 | #define FSCPOS_REG_EVENT_STATE 0x04 | |
65 | #define FSCPOS_REG_CONTROL 0x05 | |
66 | ||
67 | /* watchdog */ | |
68 | #define FSCPOS_REG_WDOG_PRESET 0x28 | |
69 | #define FSCPOS_REG_WDOG_STATE 0x23 | |
70 | #define FSCPOS_REG_WDOG_CONTROL 0x21 | |
71 | ||
72 | /* voltages */ | |
73 | #define FSCPOS_REG_VOLT_12 0x45 | |
74 | #define FSCPOS_REG_VOLT_5 0x42 | |
75 | #define FSCPOS_REG_VOLT_BATT 0x48 | |
76 | ||
77 | /* fans - the chip does not support minimum speed for fan2 */ | |
78 | static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 }; | |
79 | static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab }; | |
80 | static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 }; | |
81 | static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf }; | |
82 | ||
83 | /* temperatures */ | |
84 | static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 }; | |
85 | static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 }; | |
86 | ||
87 | /* | |
88 | * Functions declaration | |
89 | */ | |
b9e39b1b JD |
90 | static int fscpos_probe(struct i2c_client *client, |
91 | const struct i2c_device_id *id); | |
92 | static int fscpos_detect(struct i2c_client *client, int kind, | |
93 | struct i2c_board_info *info); | |
94 | static int fscpos_remove(struct i2c_client *client); | |
1da177e4 | 95 | |
f6c27fc1 DJ |
96 | static int fscpos_read_value(struct i2c_client *client, u8 reg); |
97 | static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value); | |
1da177e4 LT |
98 | static struct fscpos_data *fscpos_update_device(struct device *dev); |
99 | static void fscpos_init_client(struct i2c_client *client); | |
100 | ||
101 | static void reset_fan_alarm(struct i2c_client *client, int nr); | |
102 | ||
103 | /* | |
104 | * Driver data (common to all clients) | |
105 | */ | |
b9e39b1b JD |
106 | static const struct i2c_device_id fscpos_id[] = { |
107 | { "fscpos", fscpos }, | |
108 | { } | |
109 | }; | |
110 | ||
1da177e4 | 111 | static struct i2c_driver fscpos_driver = { |
b9e39b1b | 112 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 113 | .driver = { |
cdaf7934 LR |
114 | .name = "fscpos", |
115 | }, | |
b9e39b1b JD |
116 | .probe = fscpos_probe, |
117 | .remove = fscpos_remove, | |
118 | .id_table = fscpos_id, | |
119 | .detect = fscpos_detect, | |
120 | .address_data = &addr_data, | |
1da177e4 LT |
121 | }; |
122 | ||
123 | /* | |
124 | * Client data (each client gets its own) | |
125 | */ | |
126 | struct fscpos_data { | |
1beeffe4 | 127 | struct device *hwmon_dev; |
9a61bf63 | 128 | struct mutex update_lock; |
1da177e4 LT |
129 | char valid; /* 0 until following fields are valid */ |
130 | unsigned long last_updated; /* In jiffies */ | |
131 | ||
132 | /* register values */ | |
133 | u8 revision; /* revision of chip */ | |
134 | u8 global_event; /* global event status */ | |
135 | u8 global_control; /* global control register */ | |
136 | u8 wdog_control; /* watchdog control */ | |
137 | u8 wdog_state; /* watchdog status */ | |
138 | u8 wdog_preset; /* watchdog preset */ | |
139 | u8 volt[3]; /* 12, 5, battery current */ | |
140 | u8 temp_act[3]; /* temperature */ | |
141 | u8 temp_status[3]; /* status of sensor */ | |
142 | u8 fan_act[3]; /* fans revolutions per second */ | |
143 | u8 fan_status[3]; /* fan status */ | |
144 | u8 pwm[2]; /* fan min value for rps */ | |
145 | u8 fan_ripple[3]; /* divider for rps */ | |
146 | }; | |
147 | ||
148 | /* Temperature */ | |
149 | #define TEMP_FROM_REG(val) (((val) - 128) * 1000) | |
150 | ||
151 | static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr) | |
152 | { | |
153 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1])); | |
154 | } | |
155 | ||
156 | static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr) | |
157 | { | |
158 | /* bits 2..7 reserved => mask with 0x03 */ | |
159 | return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03); | |
160 | } | |
161 | ||
162 | static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr) | |
163 | { | |
164 | return sprintf(buf, "1\n"); | |
165 | } | |
166 | ||
167 | static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data | |
168 | *data, const char *buf, size_t count, int nr, int reg) | |
169 | { | |
170 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
171 | if (v != 1) { | |
172 | dev_err(&client->dev, "temp_reset value %ld not supported. " | |
173 | "Use 1 to reset the alarm!\n", v); | |
174 | return -EINVAL; | |
175 | } | |
176 | ||
177 | dev_info(&client->dev, "You used the temp_reset feature which has not " | |
178 | "been proplerly tested. Please report your " | |
179 | "experience to the module author.\n"); | |
180 | ||
181 | /* Supported value: 2 (clears the status) */ | |
3fd1bb9b | 182 | fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr - 1], 2); |
1da177e4 LT |
183 | return count; |
184 | } | |
185 | ||
186 | /* Fans */ | |
187 | #define RPM_FROM_REG(val) ((val) * 60) | |
188 | ||
189 | static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr) | |
190 | { | |
191 | /* bits 0..1, 3..7 reserved => mask with 0x04 */ | |
192 | return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04); | |
193 | } | |
194 | ||
195 | static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr) | |
196 | { | |
197 | return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1])); | |
198 | } | |
199 | ||
200 | static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr) | |
201 | { | |
202 | /* bits 2..7 reserved => mask with 0x03 */ | |
203 | return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03); | |
204 | } | |
205 | ||
206 | static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data | |
207 | *data, const char *buf, size_t count, int nr, int reg) | |
208 | { | |
209 | /* supported values: 2, 4, 8 */ | |
210 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
211 | ||
212 | switch (v) { | |
213 | case 2: v = 1; break; | |
214 | case 4: v = 2; break; | |
215 | case 8: v = 3; break; | |
216 | default: | |
217 | dev_err(&client->dev, "fan_ripple value %ld not supported. " | |
218 | "Must be one of 2, 4 or 8!\n", v); | |
219 | return -EINVAL; | |
220 | } | |
221 | ||
9a61bf63 | 222 | mutex_lock(&data->update_lock); |
1da177e4 LT |
223 | /* bits 2..7 reserved => mask with 0x03 */ |
224 | data->fan_ripple[nr - 1] &= ~0x03; | |
225 | data->fan_ripple[nr - 1] |= v; | |
226 | ||
227 | fscpos_write_value(client, reg, data->fan_ripple[nr - 1]); | |
9a61bf63 | 228 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
229 | return count; |
230 | } | |
231 | ||
232 | static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr) | |
233 | { | |
234 | return sprintf(buf, "%u\n", data->pwm[nr - 1]); | |
235 | } | |
236 | ||
237 | static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data, | |
238 | const char *buf, size_t count, int nr, int reg) | |
239 | { | |
240 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
241 | ||
242 | /* Range: 0..255 */ | |
243 | if (v < 0) v = 0; | |
244 | if (v > 255) v = 255; | |
245 | ||
9a61bf63 | 246 | mutex_lock(&data->update_lock); |
1da177e4 LT |
247 | data->pwm[nr - 1] = v; |
248 | fscpos_write_value(client, reg, data->pwm[nr - 1]); | |
9a61bf63 | 249 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
250 | return count; |
251 | } | |
252 | ||
253 | static void reset_fan_alarm(struct i2c_client *client, int nr) | |
254 | { | |
255 | fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4); | |
256 | } | |
257 | ||
258 | /* Volts */ | |
259 | #define VOLT_FROM_REG(val, mult) ((val) * (mult) / 255) | |
260 | ||
30f74292 | 261 | static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
262 | { |
263 | struct fscpos_data *data = fscpos_update_device(dev); | |
264 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200)); | |
265 | } | |
266 | ||
30f74292 | 267 | static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
268 | { |
269 | struct fscpos_data *data = fscpos_update_device(dev); | |
270 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600)); | |
271 | } | |
272 | ||
30f74292 | 273 | static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
274 | { |
275 | struct fscpos_data *data = fscpos_update_device(dev); | |
276 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300)); | |
277 | } | |
278 | ||
279 | /* Watchdog */ | |
280 | static ssize_t show_wdog_control(struct fscpos_data *data, char *buf) | |
281 | { | |
282 | /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */ | |
283 | return sprintf(buf, "%u\n", data->wdog_control & 0xb0); | |
284 | } | |
285 | ||
286 | static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data | |
287 | *data, const char *buf, size_t count, int reg) | |
288 | { | |
289 | /* bits 0..3 reserved => mask with 0xf0 */ | |
290 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0; | |
291 | ||
9a61bf63 | 292 | mutex_lock(&data->update_lock); |
1da177e4 LT |
293 | data->wdog_control &= ~0xf0; |
294 | data->wdog_control |= v; | |
295 | fscpos_write_value(client, reg, data->wdog_control); | |
9a61bf63 | 296 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
297 | return count; |
298 | } | |
299 | ||
300 | static ssize_t show_wdog_state(struct fscpos_data *data, char *buf) | |
301 | { | |
302 | /* bits 0, 2..7 reserved => mask with 0x02 */ | |
303 | return sprintf(buf, "%u\n", data->wdog_state & 0x02); | |
304 | } | |
305 | ||
306 | static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data | |
307 | *data, const char *buf, size_t count, int reg) | |
308 | { | |
309 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02; | |
310 | ||
311 | /* Valid values: 2 (clear) */ | |
312 | if (v != 2) { | |
313 | dev_err(&client->dev, "wdog_state value %ld not supported. " | |
314 | "Must be 2 to clear the state!\n", v); | |
315 | return -EINVAL; | |
316 | } | |
317 | ||
9a61bf63 | 318 | mutex_lock(&data->update_lock); |
1da177e4 LT |
319 | data->wdog_state &= ~v; |
320 | fscpos_write_value(client, reg, v); | |
9a61bf63 | 321 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
322 | return count; |
323 | } | |
324 | ||
325 | static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf) | |
326 | { | |
327 | return sprintf(buf, "%u\n", data->wdog_preset); | |
328 | } | |
329 | ||
330 | static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data | |
331 | *data, const char *buf, size_t count, int reg) | |
332 | { | |
333 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff; | |
334 | ||
9a61bf63 | 335 | mutex_lock(&data->update_lock); |
1da177e4 LT |
336 | data->wdog_preset = v; |
337 | fscpos_write_value(client, reg, data->wdog_preset); | |
9a61bf63 | 338 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
339 | return count; |
340 | } | |
341 | ||
342 | /* Event */ | |
30f74292 | 343 | static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
344 | { |
345 | /* bits 5..7 reserved => mask with 0x1f */ | |
346 | struct fscpos_data *data = fscpos_update_device(dev); | |
347 | return sprintf(buf, "%u\n", data->global_event & 0x9b); | |
348 | } | |
349 | ||
350 | /* | |
351 | * Sysfs stuff | |
352 | */ | |
353 | #define create_getter(kind, sub) \ | |
30f74292 | 354 | static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
355 | { \ |
356 | struct fscpos_data *data = fscpos_update_device(dev); \ | |
357 | return show_##kind##sub(data, buf); \ | |
358 | } | |
359 | ||
360 | #define create_getter_n(kind, offset, sub) \ | |
30f74292 | 361 | static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\ |
1da177e4 LT |
362 | *buf) \ |
363 | { \ | |
364 | struct fscpos_data *data = fscpos_update_device(dev); \ | |
365 | return show_##kind##sub(data, buf, offset); \ | |
366 | } | |
367 | ||
368 | #define create_setter(kind, sub, reg) \ | |
30f74292 | 369 | static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \ |
1da177e4 LT |
370 | *buf, size_t count) \ |
371 | { \ | |
372 | struct i2c_client *client = to_i2c_client(dev); \ | |
373 | struct fscpos_data *data = i2c_get_clientdata(client); \ | |
374 | return set_##kind##sub(client, data, buf, count, reg); \ | |
375 | } | |
376 | ||
377 | #define create_setter_n(kind, offset, sub, reg) \ | |
30f74292 | 378 | static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
379 | const char *buf, size_t count) \ |
380 | { \ | |
381 | struct i2c_client *client = to_i2c_client(dev); \ | |
382 | struct fscpos_data *data = i2c_get_clientdata(client); \ | |
383 | return set_##kind##sub(client, data, buf, count, offset, reg);\ | |
384 | } | |
385 | ||
386 | #define create_sysfs_device_ro(kind, sub, offset) \ | |
387 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \ | |
388 | sysfs_show_##kind##offset##sub, NULL); | |
389 | ||
390 | #define create_sysfs_device_rw(kind, sub, offset) \ | |
391 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \ | |
392 | sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub); | |
393 | ||
394 | #define sysfs_ro_n(kind, sub, offset) \ | |
395 | create_getter_n(kind, offset, sub); \ | |
396 | create_sysfs_device_ro(kind, sub, offset); | |
397 | ||
398 | #define sysfs_rw_n(kind, sub, offset, reg) \ | |
399 | create_getter_n(kind, offset, sub); \ | |
400 | create_setter_n(kind, offset, sub, reg); \ | |
401 | create_sysfs_device_rw(kind, sub, offset); | |
402 | ||
403 | #define sysfs_rw(kind, sub, reg) \ | |
404 | create_getter(kind, sub); \ | |
405 | create_setter(kind, sub, reg); \ | |
406 | create_sysfs_device_rw(kind, sub,); | |
407 | ||
408 | #define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \ | |
409 | sysfs_fan(offset, reg_status, reg_ripple); \ | |
410 | sysfs_rw_n(pwm,, offset, reg_min); | |
411 | ||
412 | #define sysfs_fan(offset, reg_status, reg_ripple) \ | |
413 | sysfs_ro_n(fan, _input, offset); \ | |
414 | sysfs_ro_n(fan, _status, offset); \ | |
415 | sysfs_rw_n(fan, _ripple, offset, reg_ripple); | |
416 | ||
417 | #define sysfs_temp(offset, reg_status) \ | |
418 | sysfs_ro_n(temp, _input, offset); \ | |
419 | sysfs_ro_n(temp, _status, offset); \ | |
420 | sysfs_rw_n(temp, _reset, offset, reg_status); | |
421 | ||
422 | #define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \ | |
423 | sysfs_rw(wdog, _control, reg_wdog_control); \ | |
424 | sysfs_rw(wdog, _preset, reg_wdog_preset); \ | |
425 | sysfs_rw(wdog, _state, reg_wdog_state); | |
426 | ||
427 | sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0], | |
428 | FSCPOS_REG_PWM[0]); | |
429 | sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1], | |
430 | FSCPOS_REG_PWM[1]); | |
431 | sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]); | |
432 | ||
433 | sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]); | |
434 | sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]); | |
435 | sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]); | |
436 | ||
437 | sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE, | |
438 | FSCPOS_REG_WDOG_CONTROL); | |
439 | ||
440 | static DEVICE_ATTR(event, S_IRUGO, show_event, NULL); | |
441 | static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL); | |
442 | static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL); | |
443 | static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL); | |
444 | ||
87808be4 JD |
445 | static struct attribute *fscpos_attributes[] = { |
446 | &dev_attr_event.attr, | |
447 | &dev_attr_in0_input.attr, | |
448 | &dev_attr_in1_input.attr, | |
449 | &dev_attr_in2_input.attr, | |
450 | ||
451 | &dev_attr_wdog_control.attr, | |
452 | &dev_attr_wdog_preset.attr, | |
453 | &dev_attr_wdog_state.attr, | |
454 | ||
455 | &dev_attr_temp1_input.attr, | |
456 | &dev_attr_temp1_status.attr, | |
457 | &dev_attr_temp1_reset.attr, | |
458 | &dev_attr_temp2_input.attr, | |
459 | &dev_attr_temp2_status.attr, | |
460 | &dev_attr_temp2_reset.attr, | |
461 | &dev_attr_temp3_input.attr, | |
462 | &dev_attr_temp3_status.attr, | |
463 | &dev_attr_temp3_reset.attr, | |
464 | ||
465 | &dev_attr_fan1_input.attr, | |
466 | &dev_attr_fan1_status.attr, | |
467 | &dev_attr_fan1_ripple.attr, | |
468 | &dev_attr_pwm1.attr, | |
469 | &dev_attr_fan2_input.attr, | |
470 | &dev_attr_fan2_status.attr, | |
471 | &dev_attr_fan2_ripple.attr, | |
472 | &dev_attr_pwm2.attr, | |
473 | &dev_attr_fan3_input.attr, | |
474 | &dev_attr_fan3_status.attr, | |
475 | &dev_attr_fan3_ripple.attr, | |
476 | NULL | |
477 | }; | |
478 | ||
479 | static const struct attribute_group fscpos_group = { | |
480 | .attrs = fscpos_attributes, | |
481 | }; | |
482 | ||
b9e39b1b JD |
483 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
484 | static int fscpos_detect(struct i2c_client *new_client, int kind, | |
485 | struct i2c_board_info *info) | |
1da177e4 | 486 | { |
b9e39b1b | 487 | struct i2c_adapter *adapter = new_client->adapter; |
1da177e4 LT |
488 | |
489 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
b9e39b1b | 490 | return -ENODEV; |
1da177e4 LT |
491 | |
492 | /* Do the remaining detection unless force or force_fscpos parameter */ | |
493 | if (kind < 0) { | |
494 | if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0) | |
495 | != 0x50) /* 'P' */ | |
496 | || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1) | |
497 | != 0x45) /* 'E' */ | |
498 | || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2) | |
499 | != 0x47))/* 'G' */ | |
b9e39b1b | 500 | return -ENODEV; |
1da177e4 LT |
501 | } |
502 | ||
b9e39b1b JD |
503 | strlcpy(info->type, "fscpos", I2C_NAME_SIZE); |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static int fscpos_probe(struct i2c_client *new_client, | |
509 | const struct i2c_device_id *id) | |
510 | { | |
511 | struct fscpos_data *data; | |
512 | int err; | |
1da177e4 | 513 | |
b9e39b1b JD |
514 | data = kzalloc(sizeof(struct fscpos_data), GFP_KERNEL); |
515 | if (!data) { | |
516 | err = -ENOMEM; | |
517 | goto exit; | |
518 | } | |
519 | ||
520 | i2c_set_clientdata(new_client, data); | |
1da177e4 | 521 | data->valid = 0; |
9a61bf63 | 522 | mutex_init(&data->update_lock); |
1da177e4 | 523 | |
1da177e4 LT |
524 | /* Inizialize the fscpos chip */ |
525 | fscpos_init_client(new_client); | |
526 | ||
527 | /* Announce that the chip was found */ | |
528 | dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision); | |
529 | ||
530 | /* Register sysfs hooks */ | |
87808be4 | 531 | if ((err = sysfs_create_group(&new_client->dev.kobj, &fscpos_group))) |
b9e39b1b | 532 | goto exit_free; |
87808be4 | 533 | |
1beeffe4 TJ |
534 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
535 | if (IS_ERR(data->hwmon_dev)) { | |
536 | err = PTR_ERR(data->hwmon_dev); | |
87808be4 | 537 | goto exit_remove_files; |
943b0830 MH |
538 | } |
539 | ||
1da177e4 LT |
540 | return 0; |
541 | ||
87808be4 JD |
542 | exit_remove_files: |
543 | sysfs_remove_group(&new_client->dev.kobj, &fscpos_group); | |
1da177e4 LT |
544 | exit_free: |
545 | kfree(data); | |
546 | exit: | |
547 | return err; | |
548 | } | |
549 | ||
b9e39b1b | 550 | static int fscpos_remove(struct i2c_client *client) |
1da177e4 | 551 | { |
943b0830 | 552 | struct fscpos_data *data = i2c_get_clientdata(client); |
1da177e4 | 553 | |
1beeffe4 | 554 | hwmon_device_unregister(data->hwmon_dev); |
87808be4 | 555 | sysfs_remove_group(&client->dev.kobj, &fscpos_group); |
943b0830 | 556 | |
943b0830 | 557 | kfree(data); |
1da177e4 LT |
558 | return 0; |
559 | } | |
560 | ||
561 | static int fscpos_read_value(struct i2c_client *client, u8 reg) | |
562 | { | |
563 | dev_dbg(&client->dev, "Read reg 0x%02x\n", reg); | |
564 | return i2c_smbus_read_byte_data(client, reg); | |
565 | } | |
566 | ||
567 | static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value) | |
568 | { | |
569 | dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value); | |
570 | return i2c_smbus_write_byte_data(client, reg, value); | |
571 | } | |
572 | ||
573 | /* Called when we have found a new FSCPOS chip */ | |
574 | static void fscpos_init_client(struct i2c_client *client) | |
575 | { | |
576 | struct fscpos_data *data = i2c_get_clientdata(client); | |
577 | ||
578 | /* read revision from chip */ | |
579 | data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION); | |
580 | } | |
581 | ||
582 | static struct fscpos_data *fscpos_update_device(struct device *dev) | |
583 | { | |
584 | struct i2c_client *client = to_i2c_client(dev); | |
585 | struct fscpos_data *data = i2c_get_clientdata(client); | |
586 | ||
9a61bf63 | 587 | mutex_lock(&data->update_lock); |
1da177e4 | 588 | |
0cacdf29 | 589 | if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { |
1da177e4 LT |
590 | int i; |
591 | ||
592 | dev_dbg(&client->dev, "Starting fscpos update\n"); | |
593 | ||
594 | for (i = 0; i < 3; i++) { | |
595 | data->temp_act[i] = fscpos_read_value(client, | |
596 | FSCPOS_REG_TEMP_ACT[i]); | |
597 | data->temp_status[i] = fscpos_read_value(client, | |
598 | FSCPOS_REG_TEMP_STATE[i]); | |
599 | data->fan_act[i] = fscpos_read_value(client, | |
600 | FSCPOS_REG_FAN_ACT[i]); | |
601 | data->fan_status[i] = fscpos_read_value(client, | |
602 | FSCPOS_REG_FAN_STATE[i]); | |
603 | data->fan_ripple[i] = fscpos_read_value(client, | |
604 | FSCPOS_REG_FAN_RIPPLE[i]); | |
605 | if (i < 2) { | |
606 | /* fan2_min is not supported by the chip */ | |
607 | data->pwm[i] = fscpos_read_value(client, | |
608 | FSCPOS_REG_PWM[i]); | |
609 | } | |
610 | /* reset fan status if speed is back to > 0 */ | |
611 | if (data->fan_status[i] != 0 && data->fan_act[i] > 0) { | |
612 | reset_fan_alarm(client, i); | |
613 | } | |
614 | } | |
615 | ||
616 | data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12); | |
617 | data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5); | |
618 | data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT); | |
619 | ||
620 | data->wdog_preset = fscpos_read_value(client, | |
621 | FSCPOS_REG_WDOG_PRESET); | |
622 | data->wdog_state = fscpos_read_value(client, | |
623 | FSCPOS_REG_WDOG_STATE); | |
624 | data->wdog_control = fscpos_read_value(client, | |
625 | FSCPOS_REG_WDOG_CONTROL); | |
626 | ||
627 | data->global_event = fscpos_read_value(client, | |
628 | FSCPOS_REG_EVENT_STATE); | |
629 | ||
630 | data->last_updated = jiffies; | |
631 | data->valid = 1; | |
632 | } | |
9a61bf63 | 633 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
634 | return data; |
635 | } | |
636 | ||
637 | static int __init sm_fscpos_init(void) | |
638 | { | |
639 | return i2c_add_driver(&fscpos_driver); | |
640 | } | |
641 | ||
642 | static void __exit sm_fscpos_exit(void) | |
643 | { | |
644 | i2c_del_driver(&fscpos_driver); | |
645 | } | |
646 | ||
647 | MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung " | |
648 | "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>" | |
649 | " and Philip Edelbrock <phil@netroedge.com>"); | |
650 | MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver"); | |
651 | MODULE_LICENSE("GPL"); | |
652 | ||
653 | module_init(sm_fscpos_init); | |
654 | module_exit(sm_fscpos_exit); |